Most people who do roulettes solo in DF just want to go in and out and while they might want to pay attention to personal proves, if only to make things go faster, its not really fruitful environment for party tactics. If one wants more refined party structure to it there's always option to go with existing contacts or tossing up PF for the same. But as its fairly rare people want to se that much trouble for setting up the roles the PF likely won't fill. Best option is to go with other people you know who care.

I could see this as a DF option, not to be paired with the same job, but it would have to be opt in, the default being that people can get partied with whatever jobs since the faster queue it gives is what vast majority of the players are more for.